RBD Erfurt 2-10-2 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class K57.10 (Locobase 3786)
Data from [
] . [] notes: "Even the narrow-gauge railways did not manage to escape the "German Imperial Railways (DRG)" efforts to unify and standardise. Consequently, the 99.22 series emerged as the second standardised narrow-gauge locomotive."
Many of the components were adapted from standard-gauge designs. For example the boiler is a slightly modified series 81 boiler. The 9922 series was designed for the DRG narrow-gauge railways in Bavaria, Baden and Wnrttemberg. However, Only three locomotives were built which then ended up with RBD Erfurt. The 99 221, 99 222 and 99 223 were operated on the Eisfeld - Schoenbrunn narrow-gauge route.
221 & 223 eventually made their way to Norway during World War II. They operated for years after the war, but were then scrapped. 222 remained in what became East Germany, eventually serving as stationary boiler. She found new life on the HSB, the successor to the East German narrow-gauge system.
See [] for a detailed explanation of the Trofimoff slidegate valve. Then explain it to me ...
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | K57.10 |
| Locobase ID | 3786 |
| Railroad | RBD Erfurt |
| Country | Germany |
| Whyte | 2-10-2T |
| Number in Class | 3 |
| Road Numbers | 99 7221-99 7223 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Schwartzkopff |
| Year | 1931 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15.75 / 4.80 |
| Engine Wheelbase (ft / m) | 28.54 / 8.70 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
| Overall Wheelbase (engine & tender) (ft / m) | 38.16 / 11.63 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 111,333 / 50,500 |
| Engine Weight (lbs / kg) | 145,064 / 65,800 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2112 / 8 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.40 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 39.40 / 1000 |
| Boiler Pressure (psi / kPa) | 203.10 / 1400 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 19.69" / 500x500 |
| Tractive Effort (lbs / kg) | 33,448 / 15171.78 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.33 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 82.85 / 7.70 |
| Grate Area (sq ft / m2) | 19.15 / 1.78 |
| Evaporative Heating Surface (sq ft / m2) | 1037 / 96.40 |
| Superheating Surface (sq ft / m2) | 355 / 33 |
| Combined Heating Surface (sq ft / m2) | 1392 / 129.40 |
| Evaporative Heating Surface/Cylinder Volume | 149.44 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3889 |
| Same as above plus superheater percentage | 4901 |
| Same as above but substitute firebox area for grate area | 21,202 |
| Power L1 | 8930 |
| Power MT | 884.16 |